Door-check.



J. J. DALY.

DOOR CHECK.

APPLIOATION PILED JULY 14,1914.

Hu 1 9 1 9 L m d B LIJ H e t na D Fgl C) n' 4 V w w i //IIM witnesses:

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i `r 1: l an JOHN DAILY OF NEW BRUNSWICK, NEW J'ERSEY, ASSIGNOR TO THE BANKER MANUFAGTURING- COMPANY, OF NEW BRUNSWICK, NEW JERSEY, A COR- PORATION or ;NEW JERSEY.

meiner.,

DOOR-CHECK.

Patentedl Maro 9, TQT&

Application filed July 14:, 1914. Serial No. 850394.

To all whom it may concm: 4

Be it known that I, JOHN J. DALY, a citizen of the United States of America, and a resident of New Brunswick, in the County of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Door-Checks, of which the :following is a specification. j

This invention relatesparticularly to the type of door-check which is adapted to be concealed in a mortise in the door, in which one part, usually thedoor, contains a cylinder and piston the movement of which is fluid checked, and the other part, usually the door-jamb, carries an anchorage for a flexible connection with the piston.

The object of this invention is to provide a form of check which will require less care in installation, in which the springs for eii'ecting the closure of the door are combined, in which 'the efi`ectiveness of the springs is increased, and in which the springs are protected from injury.

In the accompanying sheet of drawings which forms a part of this application- Figure 1 is a vertical section through a door, door-jamb and door-check embodying my invention; Fig. 2 is a horizontal section through the check with the door in closed position; and Fig. 3 is a similar section with the door in full openposition.

The door-check comprises a casin'g with preferably a plurality of cylinders 1 1 since they are of small diameter to admit of being concealed in the door framing. The cylinders at their bottoms communicate with a valved passageway 2 through which air is admitted freely to the cylinders but escapes slowly. Tn each cylinder is a pisten 3 which is forced toward the bottom by a spring 4 which abuts against a bushing 5 at the mouth of the cylinder. This bushing also serves as a guide for a piston-rod 6. A plate T screwed to the door-jamb carries an arm 8 which is pivoted so thatit can take a perpendicular position in alinement with the cylinder when the door is closed and Swing to one side sufiiciently to bring its end into the path of travel, of the mouth of the cylinder, shown by a dotteol arc, as the door closes. By reason ofthis the arm can be allowed to project a greater distance from the -door-janb than if it was a rigid part. i Also it requires less accurate positioning of the cylinder and arm relatively to each other. The arm is provided with several pivot-holes at one end to which the pivot can be shifted to alter the distance which the arm projects to suit difierent conditions and to take up if the-springs shou d weaken. Connecting between the end of the arm and the end of the piston-rod is an extensible link consistingof a sleeve portion 9 and a rod portion 10 telescoping therewith. A spring 11 protected by the sleeve draws the parts together.

When the door is fully opened the telescoping link is extended and its spring 'compressed. By reason of the length of the arm projecting from the door-jamb the line of.

the link is at a distance from the axis 12 of the door-hinges and the spring has efi'ective leverage to start the door to close from its open position.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. Tn a door-check, a cylinder adapted to be connected to a door, a piston fitting therein, a piston-rod, a plate adapted to be secured to the door-jamb, and arm pivoted to the plate, and an extensible link connecting the end of the arm and the end of the pistenrod, substantially as described.

2. Tn a door-check, a cylinder adapted to he received in a mortise in the door, a piston fitting therein, a piston-rod, a plate adapted to be'secured to the door-jamh, an arm pivoted to the plate opposite .the cylinder so that the end is free to Swing into the path of travel of the mouth of the cylinder, and

an extensible link connecting the end of the 3. Tn a 'door-check, a cylinder adapted to be connected to a door, a pi ston fitting therein, a pisten-rod, an arm adapted to be sup- .ported from the door-jamb, and a link consisting of spring-controlled telescoping parts connecting the end of the arm and the end of the piston-rod, substantially as described.`

4. Tn a door-check` a cylinder adapted to be received in a mortise in the door, a piston fitting therein, a 'pisten-rod, a plate adapted to be secured to the door-jamb, an arm piu oted to the plate opposte the cylinder so Signed at New Brunswck, N. J., this Gth that the end is free to Swing into the path day of July, 1914. of travel of the mouth of the cylinder, and

a link consisting of spring-controlled tele- JOHN DALY' 5 scopng parts connecting the end of the arm Wtnesses:

and the end of the pston-rod, substantially HENRY H. BANKER,

as described. HARVEY J. MOYNIHAN. 

